I have a spring boot application which has some end points, ex: product/version

I deployed then the application to the K8s network and expose it out using Ingress as below:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: test-ingress
  annotations:
    nginx.ingress.kubernetes.io/ssl-redirect: "false"
spec:
  rules:
  - http:
      paths:
      - path: /productApp
        backend:
          serviceName: productappservice
          servicePort: 80

I added a path to the ingress to have my application running under my-host:8080/productApp/

In the Deployment configuration, I need to add the extra context-path to my application using ConfigMap to map with the URL that the ingress is exposing:

---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: product-app
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: product-app
    spec:
      containers:
        - name: product-app
          image: my-docer-registry/product-app:latest
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
          env:
            - name: server.servlet.context-path
              valueFrom:
                configMapKeyRef:
                  name: product-app-values
                  key: server.servlet.context-path

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: product-app-values
data:
   server.servlet.context-path: '/productApp'

So now my application is running under my-host:8080/productApp/ and when I tried to call the API ex: my-host:8080/productApp/product/version, it worked fine.

The Problem came when I work with Swagger. I have swagger under: my-host:8080/productApp/swagger-ui.html and when I tried to call the product/version API, it returned TypeError: Failed to fetch . Then I realized that the host URL that swagger is sending request to is no longer my-host:8080, it was only my-host:

curl -X GET "http://my-host/productApp/product/version" -H "accept: application/json;charset=UTF-8"

and here is the example json:

{
    "swagger": "2.0",
    "info": {
        "version": "0.0.1-SNAPSHOT",
        "title": "Product App REST API"
    },
    "host": "my-host",
    "basePath": "/productApp",
    "tags": [{
        "name": "Product App API",
        "description": "REST API of Product App"
    },
    {
        "name": "version API",
        "description": "Version information of application and REST API"
    }],
    "paths": {
        .....
    }
}

What I expect here is the host URL should be my-host:8080, instead of only my-host, that's why the request in swagger is failed to sent.

Does anyone have an idea how to fix this problem. Thank you in advanced!